PCSilencioso.com: PCSilencioso is a web site dedicated to SilentPC in Spanish, with a few selected articles also in English, and with a discussion forum dedicated to this subject.

News: Translated the first article into English, about Graphics cards power consumption. Soon there will be more :)
In the meanwhile, you can use Google's translator to have a look at the complete version: PCSilencioso translated with Google's translator.